/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.tomcat.jni;

/**
 * Time
 * 
 * @author Mladen Turk
 * @version $Revision: 467222 $, $Date: 2006-10-24 11:17:11 +0800 (星期二, 24 十月
 *          2006) $
 */

public class Time {

	/** number of microseconds per second */
	public static final long APR_USEC_PER_SEC = 1000000L;
	/** number of miliseconds per microsecond */
	public static final long APR_MSEC_PER_USEC = 1000L;

	/** @return apr_time_t as a second */
	public static long sec(long t) {
		return t / APR_USEC_PER_SEC;
	}

	/** @return apr_time_t as a msec */
	public static long msec(long t) {
		return t / APR_MSEC_PER_USEC;
	}

	/**
	 * number of microseconds since 00:00:00 january 1, 1970 UTC
	 * 
	 * @return the current time
	 */
	public static native long now();

	/**
	 * Formats dates in the RFC822 format in an efficient manner.
	 * 
	 * @param t
	 *            the time to convert
	 */
	public static native String rfc822(long t);

	/**
	 * Formats dates in the ctime() format in an efficient manner. Unlike
	 * ANSI/ISO C ctime(), apr_ctime() does not include a \n at the end of the
	 * string.
	 * 
	 * @param t
	 *            the time to convert
	 */
	public static native String ctime(long t);

	/**
	 * Sleep for the specified number of micro-seconds. <br />
	 * <b>Warning :</b> May sleep for longer than the specified time.
	 * 
	 * @param t
	 *            desired amount of time to sleep.
	 */
	public static native void sleep(long t);

}
